Ooh. Nakahara Mai's maniacal laughter as Rena was great in this episode!! Too bad there wasn't the laughter/usoda! scenes which creeped the hell out of me in the original game, but that scene alone pulled it off rather well.

Overall, I think they did Onikakushi quite well for the time frame. It could've used a bit more detail that they had in the game, but for the casual viewer, 4 episodes per chapter sounds about right. Now we move onto Watanagashi, which gets even creepier (I hope they can pull the "chamber" scene well).